Fix ear piece on OnePlus 3T/3

Ear piece of OnePlus 3/3T's volume is too low, not only me, thousands of people posting this on OnePlus community forum, but no official answer from OnePlus side. So whenever I want to answer a call, I have to search for my earphones or put it on speakers (which is stupid to think itself, speaking personal or private calls in speaker). Push OTA update fixing the ear piece's volume, so it's audible even in loud environment, and try to keep up with OP community in forums. Please fix this asap.